"Double O" ⟨Ꚙ ꚙ⟩ is a letter of the Cyrillic script. It is found in some early Old Church Slavonic manuscripts, where it is used in place of ⟨О⟩ in: двое "two"' обо "both"' обанадесять "twelve"' and двоюнадесять "twelve". The Cyrillic "double O" looks similar to the Latin-script double-o ligature: ⟨ꝏ⟩.

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